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หัวเจียรยาง For Dummies

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The English Chemist Joseph Priestley gave it the name rubber in 1770 when he discovered it could be utilized to rub out pencil marks. Its big business accomplishment came only after the vulcanization approach was invented by Charles Goodyear in 1839. Significantly reduces enough time it will take for ending Successfully Submitted (Awaiting Approval)
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